Window construction



Nov. 27, 1951 W. H. RuNDQUlsT 2,576,539

WINDOW CONSTRUCTION Filed Jan. 10, 1946 4 Sheets-Sheet l 2 *I+ j Nov. 27, 1951 Filed Jan. 10, 1946 w. H. RUNDQUls-r 2,576,539

wINDow coNsTRUcTIoN 4 Sheets-Sheet 2 @W @c1/mu, u 07726? NOV- 27, 1951 w. H. RUNDQUIST WINDOW CONSTRUCTION 4 Sheets-Sheet 5 Filed Jan. 1o, 1946 y W, j

Nov. 27, 1951 w, H. RuNDQUxsT WINDOW CONSTRUCTION 4 Sheets-Sheet 4 Filed Jan. lO, 1946 Patented Nov. 27, 1951 UNITED.

STATES PAT ENST 'OFFICE WINDQW' CONSTRUCTION` Willard'fH Rund'luis't', Rocki'sland; Ill., assigner'v r Reek?Island:Millworky Company; ai corporation otrlllinoisli The pre's'ent'invention relates kgenerally to-'slicl' ingfwindows; andmoreparticularly toa doublehungwindow' unit o1- assembly; which: may be easily "inserted VintoI andremoved froml a suitable window opening'. More specic'ally; the' present invention may also 'provide a weather stripped" windowsash.`

Ithaslong beena practice to-emp'loysash` cords and-weights; or-window balances, for lsliding sash'. Sash hungto.s1'ide`in*runs=orrslideeways; conventiona-lly' defined I\livsuitablestop-strips Afrmingfpart' ofthelwindow casing',is" commonly found in the conventional` doubler-hung' windows: Thereare -manydisadvantagesi to sucli conventionalfI Wi'ndews' sash weights orbalances; and 'l' with such channel-form slide-ways. Win- Wise with." considerable d'ifliculty-` or danger.- from thetinsidee. Suchsashvort thef outsideecan-notlbe washed'` whilexa stormiwindow exteriorly`v` thereof remainsldnpiace. Whenztheglass isibrokeni and must .be.rep1aeed; `the.:worlirr-must .b'ef'done on the outsidefzor el'se-thefentire sash musteb'e removed from-:thewindowlvwith. considerable. expenditure o/timean'dilabor to remover; it andto reinstall-.zit- If.- vit.is'..the;l upper.. sashthat is: to.-be removed.. the lower sash must berstremoved.. The. conventional/.type of verticalsliding. window. is.also expensive. to construct and..to.insta11\r compared to..the improvements .ofith'e present invention..y

The. present invention. offers many advantages, andovercornes many ofthe ab'ove mentioned'y defcts found` in the conventional window. The new structure', is less expensive to manufacture; toir'istall,= and to'repair.' Th'enew/"windo'w may b'e-installed'with afgreat saving vvof time over' that required to install theeonventional window!l The newrstucture is# notL wholly limited to new" as;`

semblies of frame andv sash; andl by' modieation's Vherein'after referred to, conventional frameslwith easil'yfi'nto .the .window f'an'iev therefor.. and Vfeas'ril'yi Otherand' ancillaryob'j ects. and advantageslof.

the present invention-will .become apparent'..from the following descriptionand. explanation-of. the

invention as illustrated the?. acc'omipanyin'g'v drawings; in1which:

Fig. llisa'faceviewof anoutside window-front the-.interior side.`

Fig". 2. iis a". verticalscrosssection: 'of the' line.4 2"-2 of Eig; 11'.. l

Fig.. 3. ist a.horizontal.crosseseetiony enlarged andfragmentarvlorrthe 1inef3-3fof 11.1001;-` ing. downwardly tOWardIthe-fSiII, .and lshowingain cross-section thefssash stiles.- and the' slideeway structures?4 therefor. l

Fig. 4-is a view similarto-Fig. 2showinga1sash.- carrying assembly; displaced toward the interior of r the room andv mountedby aelinkage connection to the :window 1 frame;v 4

Fig. 54 is a vvertical'.elevatlonlof the: slide-way.- forming` structureshowingthe.linkage which .ap-V pears ini Fig. 4:

Fig... 6- isanenlargedcross-section of the .struc ture shownzin. Fig.. 5 on theline .6--6 thereof.

Fig; '7 is an enlarged. fragmentenTV- vertical cross-section taken. Online 1-1 of..Fig. 1 showing. the lower.- sasi-l..-sligh.tly raised'. from. thesill,v showing afriction grip. device, and showing a` weather strip.. constructionbeneath Athe lower .sash rail'.

Suis-an enlargedfragmentary cross-section oilthelower sash. and. parts lateral. thereto, showing.- in..particular. the construction` voffa friction gripping meansset into -the sash stile, ,said view being on .the Vline .8"-8of Fig. 1.

- Fig. 9 is a. horizontal enlarged fragmentaryy View. in'` crossfsection. on ythe line 9`9of Fig., 4. showing ,the connection ofthe hanginglink to theV window frame side.

Fg.,.10' is a fragmentary perspective View of weatherv strippingfor mounting as shownon' the top andb'ottom rails of the upper sash andonthe bottom'v rail of "the lower sash.

Fig.. 11 is' an" end 'view'of aconventional windowi sash'boredanjd slottedfora sash cord; andlsub; ject" to modiation t'o embdy'th'e present inl vention as shown in Figs. 12 and. 13.

Figs. 12A and '13 represent the conventional win,-v dow sash" of"F'ig. 11route`d;out.alongfthe entire faceof" the stile and 'fitted 'with an insert slotted" for a monorail'frming part' of the slideavevi-l formngstruc'ture. l

[Thepresent invention requires a wallhavng 'a window opening therein, which opening is commonly supplied as a prefabricated frame to be mounted in a wall. Conventional prefabricated frames of the type long supplied for the common double-hung window with upper and lower sliding sashes, may be modified for cooperation with the sash-carrying unit or assembly of the present invention. Such unit or assembly is a structure which may be readily mounted in and removed from the opening of the window frame, to coml plete the window. Where the conventional vertical sliding sashes are involved, sash-holding means may be provided of a type avoiding the use of sash weights or spring balances. Where the window structure is such that the sash may Y slide horizontally, no sash-holding means is required.

The window frame is such that it provides two parallel frame members between which a sash slides. Commonly these are the vertical members, and for this reason the invention is illustrated by reference to a vertical double-hung window. From this description and explanation it will be obvious to those skilled in the art how the illustrated structure may be differently embodied and modified without departing from the spirit and scope of the invention as set forth in the appended claims.

The sash unit, or assembly, hereinafter vreferred to as the sash unit, comprises means forming two parallel slideways for each sash, and where there are two slideable sashesfthere tis at each frame side on which the sashes slide, ls"lideway-forming-means to provide adjacent and parallel slide-Ways. Thenature of the slideway may vary greatly in detail. It may be the conventional channel in which the sash edge slides, as illustrated by the .space between the conventional vertical parting stop and the inner or outer vertical stops in conventional doublehung windows. The slide-Way may be any sort of track or slide-rail on which the Window slides with a guided relation. Preferably the slideway is a monorail for each sash, fitting into a groove in the edge face of the sash. With such a monorail, the conventional stop members which form the conventional slide-channel, may be dispensed with insofar as they` need serve as guides for the sliding. However, such stop members may be retained for other reasons, for example, conventional appearance for the new window of the present invention, or, with respect to the parting stop, to space the adjacent sash stiles, thus to permit use of the conventional wider sash top-rails reversely tapered for wedging together in the closed position of the sashes.

i A sliding interlocking relationship may exist between veach sash and the slide-way-forming means. One function of this relationship `is to Y permit the sashes and said means, at each slid- 'ingV edge of the sashes, to be joined together in their intended sliding relationship as an integral unit. This unit, referred to'above as the sash unit, is then easily inserted into a suitablel window opening therefor, and then by merely securing the slide-wayfforming means to the frame,

, the window may be complete with its slideable supporting web of the monorail, similar to the conventional locomotive rail, and having in the sash a receiving-groove to interlock withit. One manner of doing this is illustrated hereinafter. The preferred sash-holding means merely prevents sliding of the window by the force of gravity, and it is not intended to counterbalance the weight of the sash. The holding-means may be any conventional structure for holding the Sash against sliding by positive engagement, or by a frictional engagement, for the purpose. The preferred location for such a holding means is a concealed one within the sliding stile of the sash, and it is preferably arranged frictionally to engage the preferred monorail, and is preferably constructed to permit adjustment of the degree of frictional engaging pressure, in part to compensate for the eifects of time, such as wear in use. A suitable and an improved form 'of such means is described hereinafter.

'The slide-way forming means for each sash may take many forms, and be of many materials. It may be a composite structure, of several .parts united or not, or an integral structure. Preferably, the two adjacent slide-ways at eachfside of the frame for the two sashes, are embodied in a single member. The preferred structure for such a member is a sheet-metal conformation, providing the desired slide-ways, or the preferred monorail, and any desired stop-like members, or any desired trim strips, or sealing means against the elements, such as wind and rain. Stainless steel may be employed, or zinc sheet, or other non-corrosive metal or alloy.

A useful hanging means, or a linkage, is optional, and highly advantageous, for example, to *permit the sash unit to be moved in one direction as into the interior of a house from the window opening, in order to expose the external face of the sash unit for easy access from within the room. Such linkage means also serves to guide the sash unit from Such displaced position back into its normal position in the frame. Y

When the sash unit is thus exposed by such movement onv the linkage means, the window may be conveniently washed from the inside. In winter this may be done advantageously while a Storm window remains in place. Also when the sash unit is thus exposed, one or both of the sashes may be readily removed, endwise of the slide-ways where the interlocking relationexists, for example, to Vpermit renewing glass in a sash. Such hanging means, or linkage, to permit such motion, is connected at one end of the sash unit and at the other end to the windo-w frame. A suitable linkage or hanging means for these purposes is described hereinafter.

Numerous other improvements or structures may be added to the essential parts of the window structure as above referred to, and these will add to the value of the window. ySome of these are villustrated and described along with the essential elements of the present invention.

In Figs. 1, 2 and 3, (certain conventional structural portions of a window are designated as follows: A window frame structure has'the head jamb I0 and opposite thereto the sillz'I'l, with side jambs I2 and I3 extending vertically between them. Externally of said frame,` as shown in Fig. 2, is the side casing I4, headcasing I5, and above the latter a drip cap I6. There areblind stops I'I at the head and sides over the edges of the head and side jambs. Internally of the window frame there is the stoolv I8 and -this channel the upper sash 22 slides.

beneath it theconventional apron vr| 9. Upwardly from` thestool .rises the vertical window vtrim members 21) extending to the cap trim 2|.

H'Th'e upper window sash comprises a frame 22 and'window glass 23. The frame 22 consists of upper-'top rail 24, check rail 25, and stiles 26 and 2T.

The bottom sash has sash frame 29 and glass 36. The sash frame '29 consists Aof check rail 3|, bottom rail 32, and stiles 33 andr 34".

All of the foregoing parts are conventional. Between the upper and lower sash and in the head jamb there is a top horizontal parting stop 36, which departs from conventional structure in that its ends stop short of the side jambs A |2 and |-3, and thereby provide clearance spaces 3'1'and 38 having the vfunction of permitting edgewise insertion of movable vertical structures through the clearance space, to lie alongside the side j ambs.

Ih Fig. 6 there is shown in cross-section means for forming slide-ways for the sash, which means is illustrated as a vertically elongated integral unit 'formed of sheet metal.. yIt is referred to herein -as vertical side member 40 for the right hand side of the window in Fig. 1 and as '4i lli) when reversely constructed for the left hand sideof Fig. l. It vmay partake of manyforms to provide slide-ways, and in the form particularly-illustrated it has the following parts. l'he left'handedge of the sheet metal is turned over to r'form a blunt folded edge 42 which ts into a 'groove adapt-ed to receive it, as more particularly shown in Fig. 3, said groove being designated 43 located inthe Yblind stop and having its opening directedA alongside the face of thel side iamb, which guides the edge 42 into groove 43. To the right of said folded edge or flange 42, there is adoubled-back loop of metal forming a channel sidel or `stop designated 44 which is companion to a channel side A45 formed in the sheet metal in shaping the metal into a rectangular structure serving as a conventional parting stop 46. The bottom of the channel is formed by the sheet metal portions 41 and in However, the middle of the channel contains an upstanding portion serving as a track-rail 48 with a rounded 'edge 4or bead 48a of circular crossesection, which structure is also herein termed a monorail. Said monorail lits into a groove in the sash, later described. VThus, the ksash rides in a slide-way which functions by reason ofr the channel sides 4.4 and 45 without the monorail 48, 0r functions with the monorail 48 alone without the channel side'svM and 415.

'The sheet metal forming the side member 40 extends toward 'the interior lof the window from the partingl stop 46 by forming a comparable channel for the lower sash, said channel having channel sides 49 and 50 and a like monorail 5| withbead Sla;

The channel side 50 may be extended forwardly towardthe interior of vthe room in order to provide 'interior `finish for the window, comparable to `the conventional inside stop. As illustrated a conventional vertical Wood strip or trim 53 'is shown in.Fig. 6, and it is anchored'to the sheet metal by reversely bending the channel side 50 to` provide a channel structure having bottom 54 and other channel side 55, which latter ts into `4a lgroove vin -the trims strip 53. The dotted line 56, in trim strip '5'3' in Fig. 6 indicates screws which secure the trim strip 53 to the side Ajambe a's'a'bove shown in Fig. 3. ThusA by mounting the 6i trim strips 53 to `.the side jambsl when the side members 4B and 4|.' are placed against the jamb: with the flange 42 iin the groove 43 of 'the blind stop the whole structure is .rigidly andlxedly mounted, and provides a slide-way for each sash.

structure is duplicated on both verticalsides:

ofthe window, as shown. A number of mounting screws 56 are provided according tothe vertical span ofthe window opening.

AIt isobserved that the line of the channel bottoms 41' .for the slide-ways is inwardly of the opening from the line of the edge 42V and channel. 54 to provide space 5`|V (Fig. 3) for a mountinglink, later described.

`Each window sash 22 'and 29- is correspondingly grooved to `vslide upon monorails 48 'or 5|. described in ldetail with reference to the upper sashl 22 "as best 4shown in cross-section in Fig. 3.

With respect particularly to the monorail 4'8 and its circular bead 48, there .is provided inthe 4slid-ing edge vface of the sash stile v21 (Fig. 3)r a groove 58 Wide enough to slide readily on the web of monorail 48, and enlarged at the bottom in a circular enlargement to receive and slide readily around the bead 48e. The closeness of fit .between the monorail and the groove is such as to form a substantially closed passageway thus to wind-proof the structure around the edge of the sash. iith such wind-proofing 'structure the sash edge `may have considerable clearance between the grooved 'face and the channel bottoms 41 of the slideway, and alsothere may be con# siderable looseness in the lit of the stile between the channel sides 44 and 45. The fit of the monorail in the groove can be made to control the clearance between the grooved face of the stile and the 'channel bottom 41, and the latter will move to a limited extent as the sash may change its dimensional width. The clearance space 57 (Fig. 3) for the mounting linkage, thus serves additionally to prevent edgewise binding of the sash. Thus, swelling of the ywood of the sash will not lead to binding, when the guided sliding is ef'- fected by the monorail and groove.

Reference is made to Figs. -2 and 4 which more clearly show the check rails 25 vand 3|. These have the conventional cooperating tapered constructions, extending the rails beyond the flush faces ofthe Stiles. In order to avoid thel unconventional appearance of space between the stiles ofthe upper and lower sashes, where the monorails serve as the effective sliding guides, the side member 40 is `formed with a Simulated parting stop 46. As a parting stop, it `may be dispensed with when the monorail is provided, but should the monorail be dispensed with, the parting stop 46 would perform its conventional stop function in conjunction with the channel side 44 for the upper sash, and with the channel side 50 for the lower sash. However it functions, utllization'i's made of the hollowA space within the parting stop 46, to mount vtherein an anchorage-for linking means which maybe used to tie'the vertical member 40, to the window frame. As shown, there is vmounted within the parting stop a channel-shaped piece of metal 60 (Figs. 3, 5 'and 6) with one channel side 6| lying in or closing the open area of a portion of the channel-form parting stop 46, and having an opposite channel side 62 lying against the bottom of the channel-form parting stop 46, to which it is anchored by one or more countersunk screws B3. To the exposed channel side 6|, which is flush with the adjacent faces, is pivoted a link 64. At its opposite end This 4 isV the link 64 carries an angle block or bar 65 pivoted at 66. Said bar 65 is shown in cross-section .in Fig. 9 as sliding in a channel-form piece of Vmetal 61. On its channel side 68there is a detent in the form of a flange 69 for a slidingly engaged short ange 10 on the bar 65, to prevent Withdrawal of the parts facewise. The bar 65, therefore,V slides `vertically in the channel 61 which is mounted in a groove 1I in the side jamb I3. The groove 1I is comparable to the conventional groove provided in a conventional side lamb for the conventional parting stop. As shown, the groove 1I extends the full length of the side jamb I3, but this is not necessary, and

' results only from the use of a conventional side jamb. Screws 12 (Fig. 3) are shown for mounting the channel 61 within groove 1|, as shown.

. By means of this linkage each vertical side member V*providing the Aslide-way, may be swung forwardly, as into a room, to the limit permitted by the link 64, which slides freely at one end vertically in the channel of the side jamb.

. To prevent the sashes sliding freely in their slideways formed by the two opposing side members 40 and 4|, there is provided a suitable holding means. As illustrated, the holding means is notY positive in action, but is such as to provide sufficient friction to avoid any undesired sliding of the sash. Concealed means for this frictional gripping is preferred. Simple means is also provided to adjust or correct the degree of friction exercised. In Fig. 3 in the lower sash 29, there is shown in dotted lines two block-like members 13, and associated with them adjusting screws 14 of which the heads ride in metal sockets of washer-like members 14@L on the face of the sash. The blocks 13 are better shown in Figs. 1 and 8 as a -bifurcated member having the base 15 and the two gripping lingers 15a and 15b. A suitable gripping structure is formed of a hard maple-wooden block which is slit to provide the spaced cut 16, the bottom of which is enlarged in a circular form 11 to prevent a wood-splitting extension of the cut. Toward the end of the gripping fingers there is also a second enlargei ment 18 located and shaped to grip the beads 48*aL or 51a on the described monorails. These wood blocks are merely set into recesses cut into the sash stiles from the sliding edge-face of the stile.

The adjusting screw 14 is threaded into the'furthermost finger 15a, and passes freely through the sashes from sliding against gravity, the twoV side members 46 and Hand the two sashes 22 and 29 may be assembled into a four piece as* sembly or1 unit. First consider that the linkage 64 is not provided or is removed. The sash unit thus consisting of the two side members 46 and lil and the two sashes is a substantially rigid unit. When this unit is assembled with the lower sash raised andthe upper sash lowered from closed position as shown in Fig. 4, the whole unit may be bodily inserted into the window frame opening described, up to the blind stopsl1. The tops of the side members 40 and 4l pass the ends of the so-called top horizontal parting stop 36, and

. the end anges 42 of the side members 40 and 4I enter and bind tightly into the grooves 43 in the corresponding blind stops, thus to provide a Wind proof seal. To secure the structure in place the screws 56 are entered into the side jambs i2 and i3 to hold the interior trim strips 53- in place, thus binding the sheet metal to the jambs. Then the windows maybe moved into closed position as shown in Fig. 2. In this closed position of each sash it is possible to remove the mounting screws 56 without in any way rendering the structure removable. The structure cannot be Vremoved at all because the top rail 24 of the upper sash is obstructed by the so-called parting stop 36, and the lower end of the sash unit is obstructed by the bottom rail 32 of the lower sash lying behind the. stool i8. However, on opening both sashes to clear these obstructions, and with screws 56 removed, the whole sash unit may be withdrawn. Y

In order to facilitate removal of the sash unit from the window opening without detached removal, the described links 64 are provided to permit tilting of the sash unit forwardly on the ends of the trim strips 53, which are slightly rounded at to provide a fulcrum on a limited area of the stool. The fulcrum area may be protected against wearing away by inlaying a metal plate over the area covered by the'end of the trim strip 53 as it rocks. As the sas-h unit is tilted forwardly, it is tied to the frame Vby the link 64, and the bar 65 rises in its channel 61. Thus, it is clear that the channel 61 is sufficiently elongated so that its lower end will retain the bar 65 when the link 64 is vertical in the entered position of the sash unit.

Auxiliary structures for weather proong the sash may be providedy as desired. In Fig.. 10 there is shown spring metal weather stripping suitable for the purpose. It has a crimped mounted ange 82 and a V-.shaped body 83. The angle between the flange 82 and the body 83 may be changed according to the angular location of the weather stripping. This y.weather stripping is illustrated in the drawings as lo# cated at the bottom of the lower sash rail 32, in which location the V-shaped body 84 presses against the sill Il. There is also a strip 85 lof cated on the check rails, `being mountedVFig. 4, on the check rail 25 of the upper sash to seal the space between it and the check rail 3| `of the lower sash. A like strip 86 is also mounted at the top of the top rail 24of the upper sash.

The invention is capable of being embodied in conventional windows by very simple alterations in the conventional structures. In the conventional window the vertical blind stops, like stops l1, are merely grooved to provide a, groove like 43 to receive a nange 42 of the verticaly side members which are to be added to the conventional window to cover the normal side jambs. The conventional Vvertical parting stops are removed from the groove normally provided therefor in the conventional side jambs. 4The vtop parting stop is cut away at its ends to provide clearance spaces like spaces 31 and 38 in Fig. 1, for the tops of the side members to be added. Where a mounting linkage is desired, a channel structure 61 is mounted in the grooves which are exposed when the vertical parting stops areremoved from the side jambs.

ned, as to each sash; for the present invention. The rope slot is merely lextended and widened :by routingout :at-93 the VWholezedge face of the sash stile and planing down the face suflciently to permit entry of the side members providing the vslide-ways. .A hole is chisled into the stile.for the insertion of a gripping block 94, similar -to that shown in Fig. 8, and the adjusting screw v95 is provided as shown in Fig. 12. Into the routed out space 93 (Fig. 13) on the face of the vstilefis .secured .a corresponding .insert 195 which has Aa keyhole-.like slot 9.1 therein tto receive the mono- `rail therefor provided .in the side member.

`INumerous advantages other than those 'indicated above will now .be more apparent the above description. The side janibs of `the .frame are completely covered ,from .sight and from Iexposure :to the weather. `Theyneed ino paint. "ilence, grades oflumber lower-than is'con-ventional :for windows having exposed sidejjambs may abe `used. Paint need `not :be Lapplied vat any j-plaice which would lead to sticking of the .sashes, excluding fthe sill. since the sash runs, :being of metal as described, need l:no paint. Where the inner faces of the blind stops I1 are exposed and face the sashes, the unexposed and paintable portion is spaced from the upper sash frame by the thickness of the channel side 44. The painting of the sashes may lead to flow of paint into vthe interfacial space between the sashes and the sides of the channels in which the sash slides. However, where the described monorails are present, and are the effective slide-way and guide for the sash, there can be considerable clearance space (not shown in the drawings) between the sashes and the channel sides comprising vthe parting stop 46, the channel side 44, and the channel side 50. When such clearance is present the extension of paint on the sash into such clearance space will not lead to any binding of the sash.

The parts are completely protected from seepage of rain, and there are no upstanding portions or dams for providing weather protection of such character as have heretofore caused the collection of water, thereby to induce rot.

To clean the window from the inside, the sash unit is readily moved out into the position of Fig. 4. Then each sash may be brought separately to upper position for cleaning from the inside of a room. If new glass is to be inserted, each sash may be removed endwise of its slideway upwardly in Fig. 4, while the side members 40 and 4| remain in hanging position as shown.

Although the invention has been illustrated particularly for vertical sliding windows, it is understood that it is equally adaptable for horizontal sliding windows, in which case the gripping devices may be dispensed with if desired.

Numerous modifications and departures from the illustrated forms are contemplated as falling within the scope of the invention as expressed in the appended claims.

I claim:

1. A window-closure assembly comprising in combination, two spaced parallel vertical sash guides each having two independent slideways Ifor two sashes and having substantially flat outer faces positioned parallel to each other in assembled relation with sashes, whereby the assemblythereof with sashes may be moved in and out of a Window opening in a wall to position said sash guides over and substantially adjacent toi-fiat side walls of said opening, two adjacentlyrslidable 'sashes between said guides holding them to- 10 Vgether in 'fixed horizontal spaced relation, .each sash -being slidable in lone ofsaid .slide-ways, an

interlocking tongue and .grooveconnection be- .tween each sliding. edge of -a sash and the .cor-.- responding guide, said connection ,permitting sliding the. sash .edgewise along. the. yguides md serving 4to hold. the guides and zsashes Yin `r'assem- ,bled relation, and .holding meansfor .holding .the ,guides and .sashes in xed positions. j

2.1i window-closure assembly lcomprising in combination, two spaced parallelvertical V'sash guides each having twojindependent slideways for Vtwo `sashes ,and having si ibstantiallyv a-ffl outer faces positioned parallel Ito each other in assembled relation with sashes, whereby 'the assembly thereof with -sashes may `be moved in Aand out of a -windowfopeni'ng in a wall to position said vsash guides over and substantially adj acent to nat side walls of said -opening, two adjacently slidable sashes between said guidesV holding theni together in Afixed horizontal spaced relation, each sash 'being slidable iin vone vof said slideways, an interlocking tongue `and groovev :connection ibetween each -sliding iedgeof .a sash @and the .corresponding guide, said connection including a tongue on the sash guide having a longitudinal web and a retaining extension on the web, and the groove in the sash being formed slidably to engage said extension to hold the sash guide and sash together in sliding relation against withdrawal of the tongue from the groove, and holding means for holding the guides and sashes in fixed positions and maintaining the sashes and guides as a substantially rigid assembly.

3. A window-closure assembly comprising in combination two spaced parallel vertical sash guides each having two independent slideways for two sashes and having substantially flat outer faces positioned parallel to each other in assembled relation with sashes, whereby the assembly thereof with sashes may be moved in and out of a Window opening in a wall to position said sash guides over and substantially adjacent to ilat side walls of said opening, two adjacently slidable sashes between said guides holding them together in xed horizontal spaced relation, each sash being slidable in one of said slideways, an interlocking tongue and groove connection between each sliding edge 0f a sash and the corresponding guide, said connection including a tongue on the sash guide having a longitudinal web and a retaining extension on the web, and the groove in the sash being formed slidably to engage said' extension to hold the sash guide and sash together in sliding relation against withdrawal of the tongue from the groove, 'and a sliding frictional holdingv means carried by each sliding sash frictionally to grasp the tongue of said connec-l tion and resisting sliding movement by the influence of gravity and maintaining the sashes and guides as a substantially rigid assembly.

4. A window structure comprising guide means providing a slideway for a window sash, said means having a tongue entering and slideable in a groove in the edge of said sash, a sash slideable in said slideway and having a groove slidably f1tting said tongue, a friction holding device in the form of a bifurcated insert mounted in an opening therefor in the said grooved edge of said 'legs on said tongue.

5. A window structure comprising guide means providing a slideway for a window sash, said means having a tongue enteringand slideable in `a groove in the edge of said sash, a sash slideable in said slideway and having a groove slidably tting said tongue, a friction holding device in the form of a bifurcated insert mounted in an opening therefor in the said grooved edge of said sash and extending well inwardly from the base of ,said groove whereby to provide resilient legs exkthe side walls of the groove to engage the tongue,

and threaded adjusting means extending from a :retaining head at the `face of said sash inwardly through the nearer leg and into the other leg in threaded engagement arranged to adjust the relative positions of said legs to vary the frietional engagement of said legs on said tongue.

WILLARD H. RUNDQUIST.

REFERENCES CITED lThe following references are of record in the le of this patent:

, UNITED STATES PATENTS Number Name Date 940,485 Singer Nov. 16, 1909 1,680,388 McLean Aug. 14,1928 1,688,231 Fisher Oct. 16, 1928 1,727,188 Wesseler Sept. 3, 1929 1,730,001 Fisher Oct. 1, 1929 1,732,470 Hamilton Y Oct. 22, 1929 1,743,454 Howenstein Jan. 14, 1930 v11,876,363 Taylor Sept. 6, 1932 1,895,339 Ostrootet al Jan. 24, 1933 1,907,237 Berger May 2, 1933 2,096,048 Lindish Oct. 19, 1937 2,100,556 Van Fleet Nov. 30, 1937 2,202,740 Krish May 28, 1940 1 2,345,806

Glaser et al. Apr. 4, 1944 

